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LM238WF1
Liquid Crystal Display
Product Specification
SPECIFICATION
FOR
APPROVAL
( ) Preliminary Specification
( ) Final Specification
Title 23.8" Full HD TFT LCD
BUYER General SUPPLIER LG Display Co., Ltd.
MODEL *MODEL LM238WF1
SUFFIX SLA1
*When you obtain standard approval,
please use the above model name without suffix
SIGNATURE SIGNATURE
APPROVED BY APPROVED BY
DATE DATE
/ C.K. Lee / G.Manager
REVIEWED BY
D.G. Kim / Manager [C]
/
S.Y. An / Manager [M]
D.H. Kang / Manager [P]
PREPARED BY
/
S.J. Yeom / Engineer
Please return 1 copy for your confirmation with MNT Products Engineering Dept.
your signature and comments. LG Display Co., Ltd
Ver. 0.1 Oct., 11, 2012 1 / 32
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LM238WF1
Liquid Crystal Display
Product Specification
Contents
No ITEM Page
COVER 1
CONTENTS 2
RECORD OF REVISIONS 3
1 GENERAL DESCRIPTION 4
2 ABSOLUTE MAXIMUM RATINGS 5
3 ELECTRICAL SPECIFICATIONS 6
3-1 ELECTRICAL CHARACTREISTICS 6
3-2 INTERFACE CONNECTIONS 9
3-3 SIGNAL TIMING SPECIFICATIONS 14
3-4 SIGNAL TIMING WAVEFORMS 15
3-5 COLOR INPUT DATA REFERNECE 16
3-6 POWER SEQUENCE 17
3-7 VLCD Power Dip Condition 18
4 OPTICAL SPECIFICATIONS 19
5 MECHANICAL CHARACTERISTICS 25
6 RELIABLITY 28
7 INTERNATIONAL STANDARDS 29
7-1 SAFETY 29
7-2 EMC 29
7-3 ENVIRONMENT 29
8 PACKING 30
8-1 DESIGNATION OF LOT MARK 30
8-2 PACKING FORM 30
9 PRECAUTIONS 31
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LM238WF1
Liquid Crystal Display
Product Specification
RECORD OF REVISIONS
Revision Revision
Page Description
No Date
0.1 Oct., 11, 2012 - First Draft, Preliminary Specifications
-
Ver. 0.1 Oct., 11, 2012 3 / 32
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LM238WF1
Liquid Crystal Display
Product Specification
1. General Description
LM238WF1 is a Color Active Matrix Liquid Crystal Display with a Light Emitting Diode ( White LED) backlight
system without LED driver. The matrix employs a-Si Thin Film Transistor as the active element.
It is a transmissive type display operating in the normally black mode. It has a 23 inch diagonally measured
a c t i v e d i s p l a y a r e a w i t h F H D r e s o l u t i o n ( 1 0 80 v e r t i c a l b y 1 9 2 0 h o r i z o n t a l p i x e l a r r a y)
Each pixel is divided into Red, Green and Blue sub-pixels or dots which are arranged in vertical stripes.
Gray scale or the brightness of the sub-pixel color is determined with a 8-bit gray scale signal for each dot,
thus, presenting a palette of more than 16,7M colors with A-FRC (Advanced Frame Rate Control).
It has been designed to apply the 8Bit 2 port LVDS interface.
It is intended to support displays where high brightness, super wide viewing angle,
high color saturation, and high color are important.
RGB
EEPROM Source Driver Circuit
I2C S1 S1920
LVDS
G1
2port
CN1 Timing
(30pin)
Controller
Gate Driver
TFT - LCD Panel
Circuit
+5.0V
Logic Power (1920 RGB 1080 pixels)
+5.0V
Power Circuit
G1080
Block
Back light Assembly
VLED CN2 (6PIN)
(LED)
[ Figure 1 ] Block diagram
General Features
Active Screen Size 23.8 inches diagonal
Outline Dimension 543.0(H) x 317.4(V) x 11.2(D) mm (Typ.)
Pixel Pitch 0.2745 mm x 0.2745 mm
Pixel Format 1920 horiz. By 1080 vert. Pixels RGB stripes arrangement
Color Depth 16.7M colors (6bit + A-FRC)
Luminance, White 250 cd/m2 ( Center 1 Point, Typ.)
Viewing Angle(CR>10) View Angle Free (R/L 178(Typ.), U/D 178(Typ.))
Power Consumption Total 17.3 Watt (Typ.) ( 2.7 Watt @VLCD, 14.6 Watt @Is=100mA )
Weight 2,270 g (typ.)
Display Operating Mode Transmissive mode, normally black
Panel type Reverse type
Surface Treatment Hard coating(3H), Anti-glare treatment of the front polarizer
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LM238WF1
Liquid Crystal Display
Product Specification
2. Absolute Maximum Ratings
The following are maximum values which, if exceeded, may cause faulty operation or damage to the unit.
Table 1. ABSOLUTE MAXIMUM RATINGS
Values
Parameter Symbol Units Notes
Min Max
Power Input Voltage VLCD -0.3 6.0 Vdc at 25 r 2 C
Operating Temperature TOP 0 50 C
Storage Temperature TST -20 60 C
1, 2, 3
Operating Ambient Humidity HOP 10 90 %RH
Storage Humidity HST 10 90 %RH
LCM Surface Temperature
TSurface 0 65 1, 4
(Operation)
Note : 1. Temperature and relative humidity range are shown in the figure below.
Wet bulb temperature should be 39 C Max, and no condensation of water.
2. Maximum Storage Humidity is up to 40 , 70% RH only for 4 corner light leakage Mura.
3. Storage condition is guaranteed under packing condition
4. LCM Surface Temperature should be Min. 0 and Max. 65 under the VLCD=5.0V,
fV=60Hz, 25 ambient Temp. no humidity control and LED string current is typical value.
FIG.2 Temperature and relative humidity
90%
60
60%
50 Storage
Humidity [(%)RH]
Wet Bulb
Temperature [C]
40
40%
Operation
30
20
10
0
10%
-20 0 10 20 30 40 50 60 70 80
Dry Bulb Temperature [C]
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LM238WF1
Liquid Crystal Display
Product Specification
3. Electrical Specifications
3-1. Electrical Characteristics
It requires two power inputs. One is employed to power the LCD electronics and to drive the TFT array and
liquid crystal. The second input power for the LED/Backlight, is typically generated by a LED Driver.
The LED Driver is an external unit to the LCDs.
Table 2-1. ELECTRICAL CHARACTERISTICS
Values
Parameter Symbol Unit Notes
Min Typ Max
MODULE :
Power Supply Input Voltage VLCD 4.5 5 5.5 Vdc
Permissive Power Input Ripple VdRF 200 mVp-p 1
- 535 655 mA 2
Power Supply Input Current ILCD
- 655 815 mA 3
Power Consumption Pc TYP - 2.7 3.3 Watt 2
Rush current IRUSH - - 3 A 4
Note :
1. Permissive power ripple should be measured under VLCD =5.0V, 25 C, fV(frame frequency)=MAX
condition and At that time, we recommend the bandwidth configuration of oscilloscope is to be under
20Mhz. See the next page.
2. The specified current and power consumption are under the V LCD=5.0V, 25 2 C,fV=60Hz condition
whereas Typical Power Pattern [Mosaic] shown in the [ Figure 3 ] is displayed.
3. The current is specified at the maximum current pattern.
4. Maximum Condition of Inrush current :
The duration of rush current is about 5ms and rising time of power Input is 500us r 20%.(min.).
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LM238WF1
Liquid Crystal Display
Product Specification